What’s with this foam sheet on the engine air filter?
#1
Driver School Candidate
Thread Starter
What’s with this foam sheet on the engine air filter?
I just swapped out my engine air filter for the first time after picking up my 4GS last year (used)
I thought I ordered the OEM part but the existing air filter had this white foam sheet glued to it and my new one didn’t. Attaching some photos.
Has anyone else seen this? What does it do and do you need it?
I thought I ordered the OEM part but the existing air filter had this white foam sheet glued to it and my new one didn’t. Attaching some photos.
Has anyone else seen this? What does it do and do you need it?
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kingtrab (07-20-21)
#3
Lexus Test Driver
Its a pre filter. Not necessary
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kingtrab (07-20-21)
#4
Lexus Test Driver
My FSport blue air filter doesn't have that.
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kingtrab (07-20-21)
#5
Lexus Test Driver
What else did they short you on your car? spare set of front floor mat floor hooks, Owner Manual, two fob key gloves, correct mechanical keys, Dual USB power socket plug, two spare valve stem caps, one spare set of fuses, one set of license plate screws and double-face tape to prevent the license from rattling?
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JDGS350AWD (02-12-24)
#6
Lexus Test Driver
What else did they short you on your car? spare set of front floor mat floor hooks, Owner Manual, two fob key gloves, correct mechanical keys, Dual USB power socket plug, two spare valve stem caps, one spare set of fuses, one set of license plate screws and double-face tape to prevent the license from rattling?
The following 3 users liked this post by ItzFilyO:
#7
Driver School Candidate
Thread Starter
So my GS has 100k miles now. If that pre filter only comes out of the factory I wonder if that means that the engine air filter was never replaced until now 😅
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kingtrab (07-20-21)
#10
Lexus Test Driver
That has to be an aftermarket filter. I've never seen any OEM filter with it. So u can assume it was changed at some point.
#12
Instructor
That looks like a pre-filter. Once it is dirty, remove it and get another year out of the underlying filter.
Typically, they are used in very dusty environments to keep the main filter from getting plugged.
Typically, they are used in very dusty environments to keep the main filter from getting plugged.
#13
As said it's just a pre-filter. If you look into the airbox upper portion you likely also have a charcoal filter as well. Can also be safely removed, but don't quote me on that!
If I was 20-something I'd probably remove both. But honestly at this point i'd just leave all the filters as is. no real point to messing around with it all. at best you'll improve your acceleration times by 0.1s. at best.
If I was 20-something I'd probably remove both. But honestly at this point i'd just leave all the filters as is. no real point to messing around with it all. at best you'll improve your acceleration times by 0.1s. at best.
The following 2 users liked this post by E46CT:
kingtrab (07-21-21),
thisguy_06 (07-21-21)
#14
Took a look at mine, no foam pre-filter. I also have a new replacement in the garage and no foam on that one either.
#15
As said it's just a pre-filter. If you look into the airbox upper portion you likely also have a charcoal filter as well. Can also be safely removed, but don't quote me on that!
If I was 20-something I'd probably remove both. But honestly at this point i'd just leave all the filters as is. no real point to messing around with it all. at best you'll improve your acceleration times by 0.1s. at best.
If I was 20-something I'd probably remove both. But honestly at this point i'd just leave all the filters as is. no real point to messing around with it all. at best you'll improve your acceleration times by 0.1s. at best.